Service trolley



FIG. 1 is a perspective view of my design for a service trolley, showing the table top in a first position;

FIG. 2 is a side elevation thereof, the opposite side view being a mirror image thereof;

FIG. 3 is an end elevation thereof, the opposite end view being a mirror image thereof; and,

FIG. 4 is a perspective view thereof showing the table top in a second position.

The broken lines illustrate environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a service trolley, as shown and described. 